SU569540A1 - Method of preparing hydrated manganese dioxide of g-modification - Google Patents

Description

(54) METHOD FOR OBTAINING HYDRATED DIOXIDE

Manganese if .. ModiFikAiii The process of getting hydrate | manganese dioxide from a warehouse of two stages, namely, first the sky / second copy of manganese carbonate is converted into vimf sulfate nitrate according to the following scheme: MitCOjf 2HNOj Mtt (Nf5} te024H O MptCO +., and then, when ozonated, continuously added to the resulting solution, add the equivalent .. with t-t- "the total amount (relative to the amount of released acid) of manganese carbonate. The temperature of the solution during ozonation is maintained in the range of 10 -9 ° C. The chemistry of the proposed process can be represented by the total equation: McCO3 0 Mtt 0 CO + 0, where the carbonate margan in the reactor, neutralizes excess acid with the formation of soluble salts, which, when ozonized by the scientific research institute, transforms into 1: V MnO and correspondingly sourly. The formation of mineral acid in the proposed process is continuously neutralized by carbonate m} eganzo, which allows using an aspylum and its mouth |. 1o; с1ва nprntyc - the concentration of the useful component and OBO - are ozone-acidic skins (at any time)

 Acids in the reactor should be kept at 0.5 m / h at the concentration of ozone in the mixture

a given level and the process of ozone yuvani weight-35 g / m.

In continuous conditions, taking into account Pepre-B, the carpore is added by Pepreryn (firstly, the output of Mar 30 manganese dioxide, taking into account the maintenance

The sockets from the reactor. The liquid phase of the acid-50 co-granulation (30g / l.

In the case of the implementation of the proposed process, the ozonation process lasts 10 hours. Permanently with constant free-tuberculosis data are presented in a table.

Example. The initial pacriii iJ, t; ocio $ i acid, not exceeding 5 O-gO / l, which is easily reached by continuous; supplying a reaction {mixture of the calculated amount of manganese carbonate, the yield of the product with respect to the ozone ratio remains constant over time, while with a known process, e. in the case of using sulphate or friable by gradual y: vJeifbuieHH o in the liquid phase of manganese and an increase in acid, the specific consumption of ozone per unit of the weight of manganese dioxide was postdrepio increased. for this reason, the production of ogi:: o on the torus drops sharply. The proposed process b1 ;; l o; ipu6oiiM laboratory conditions c. ozonator / ITO-15 and;) of an agent with a paciii.iJSHij device of ozone-oxygenous gamma (.: out of 275 g / lMk50. 40 g / HjSO, prepared by dissolving carbonate mar1ang in a certain amount of carbon) g). 1 liter of this solution is poured into pe; .iK7-op and at room temperature through

Amount of MnO., Yluchenny by prezhuzhennomu way, g 4O, 5 80.3 118.5 (the amount of goluchennoe on iyuvesgyumu way, g40.5 75.5 106.5

Hourly yield of the product but 1 redlag. In addition to the Method, it is almost the same throughout the entire time of the experiment; the specific ozone consumption remains constant. By the same way The same hourly output

1 product from time to time falls, and the specific consumption of ozone increases. In this case, the process proceeds only until the manganese coniengation in a solution of 5 g / l, after the production of copper o

Hikshsky analysis of the product washed and dried at 100 ° C: 90%, cS}., 9.85% adsorbed and t-liquid in / shg, 0.15% impurities. X-ray diffraction analysis confirmed the presence of y-modification.

Claims (2)

The invention makes it possible to ocyui.ecT the process in unbeatable conditions, which is essentially ynyHiuaer technical and economic indicators of the process; manganese dioxide in a modification of 156.7 193.7 233.9 282, O 318.0 357.2 393.7 124.5 133.5 138.0 142.0 145, O 5 creates the conditions for its full aggomati „„ "" Claims of the invention: A process for increasing carbon dioxide by the Y-modification, including oxidation of the manganese salt with ozone to form mineral acid and product precipitate, its separation, washing and drying, so as to ensure that the process can be maintained 569 0 6 , manganese carbonate is introduced into the reaction mixture in an amount that supports the concentration of mineral acid in mixtures equal to 5O-60 g / l. Sources of information taken into account in the examination: 1. D. Marcy, T.MQ (ites-Ubef Untzei zun VOM (ll) -5a zPoSutt en nni Ozon, SKbsch. Tech. 19,7, 1967. 2. Grinberg, A.A. and lr. Oxidation of Mi III) by ozone in nitric acid solutions. Kinetics and catalysis, 12, 1971.